Fix SplayTreeMap.from ignoring the compare and isValidKey arguments.

sdk/lib/collection/splay_tree.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.collection;
 
 typedef bool _Predicate<T>(T value);
 
 /**
  * A node in a splay tree. It holds the sorting key and the left
@@ skipping 256 matching lines @@
   SplayTreeMap([int compare(K key1, K key2), bool isValidKey(potentialKey)])
       : _comparator = (compare == null) ? Comparable.compare : compare,
         _validKey = (isValidKey != null) ? isValidKey : ((v) => v is K);
 
   /**
    * Creates a [SplayTreeMap] that contains all key/value pairs of [other].
    */
   factory SplayTreeMap.from(Map other,
                             [int compare(K key1, K key2),
                              bool isValidKey(potentialKey)]) {
-    SplayTreeMap<K, V> result = new SplayTreeMap<K, V>();
+    SplayTreeMap<K, V> result = new SplayTreeMap<K, V>(compare, isValidKey);
     other.forEach((k, v) { result[k] = v; });
     return result;
   }
 
   /**
    * Creates a [SplayTreeMap] where the keys and values are computed from the
    * [iterable].
    *
    * For each element of the [iterable] this constructor computes a key/value
    * pair, by applying [key] and [value] respectively.
@@ skipping 541 matching lines @@
     return new _SplayTreeNode<E>(node.key)..left = _copyNode(node.left)
                                           ..right = _copyNode(node.right);
   }
 
   void clear() { _clear(); }
 
   Set<E> toSet() => _clone();
 
   String toString() => IterableBase.iterableToFullString(this, '{', '}');
 }